Hi BluBoy.
As stated above, I've recently gone from a 72T to a 192.
It's been a mini revelation. I can honestly say I've heard stuff in recordings I know extremely well, which I've not heard before. No B.S. Subtle things granted, and they were undoubtedly there before, but probably swamped in the mix. The 192 has created more space for the music.
I don't like to roll out tired cliches, but it's made things more live and natural sounding. More sense of natural reverb and greater seperation and imaging.
If you can find one, then I'd go for it (Arcam can still convert 72s to 192s for around £500, but you can probably find a new/nearly new 192 for less than that). And be safe in the knowledge your amp upgrade whenever it comes will reveal even more.
*I will say that only a matter of weeks before getting my 192, I introduced some Rothwell attenuators into my system. These had a '2-steps-forward, 1-step-back' effect on my system, with more detail and space, but a slightly too warm sound (Which did decrease after an extended listen). The 192 redressed the balance towards a faster, leaner (But far from lean) sound. Now it sounds great, and it's easier to do small adjustments of the volume as a bonus.